Biological removal of phosphorus and nitrogen from wastewater us

Details Biological removal of phosphorus and nitrogen from wastewater us Biological removal of phosphorus and nitrogen from wastewater us

1995-01-13

1997-02-18

Hruskoci, Peter A.

Liquid purification or separation

Processes

Treatment by living organism

210626, 210903, 210906, C02F 302, C02F 312

Patent

active

056038330

ABSTRACT:
This invention is directed to an activated sludge treatment process for removing phosphorus and nitrogen from wastewater. The process includes providing wastewater influent and activated sludge in a stressed contact zone to form a mixed liquor. In a luxury contact zone, the mixed liquor is mixed and aerated and the organisms in the activated sludge take up at least portion of the phosphorus. The method further includes separating the activated sludge from the mixed liquor, and returning at least a portion of the activated sludge to the stressed contact zone. The inventive process accomplishes wastewater treatment without having to pass the wastewater through an anaerobic zone.

REFERENCES:
patent: Re32429 (1987-06-01), Spector
patent: 3953327 (1976-04-01), Parker
patent: 3964998 (1976-06-01), Barnard
patent: 4056465 (1977-11-01), Spector
patent: 4160724 (1979-07-01), Laughton
patent: 4488967 (1984-12-01), Block et al.
patent: 4650585 (1987-03-01), Hong et al.
patent: 5022993 (1991-06-01), Williamson
patent: 5160043 (1992-11-01), Kos
patent: 5182021 (1993-01-01), Spector
patent: 5234595 (1993-08-01), DiGregorio et al.
patent: 5266200 (1993-11-01), Reid
"A/O Process.TM. Concepts; A/O Reactor Description", Air Products and Chemicals, Inc., pp. B-1-B-4.
"Newly Patented Process Reduces Phosphorus Levels", Water/Engineering & Management, p. 15, Aug., 1994.

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